Trouble Code Access
- Use Self Diagnostic Checker (49 H018 9A1) and System Selector (49 B019 9A0) to retrieve trouble codes. Connect one lead of self diagnostic checker to ground and the other to system selector. Connect system selector to diagnostic connector. See Fig 1
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Courtesy of MAZDA MOTORS CORP.
- With ignition on and engine stopped, observe Check Engine or MIL light. Note trouble codes. Check TROUBLE CODE IDENTIFICATION table for possible cause. If light remains on continuously, MIL circuit is grounded or ECU is defective.